I heard that there is a way to play BG&E with a Gamepad. But how?

Hi ,

you have to use the software for your gamepad and assign each button of the gamepad to the corresponding key ...

If you have a logitech gamepad here´s a profile:
http://www.wingmanteam.com/profiles/profiles_users.htm

Best regards
Stephan

Some program called Joy to key is good for this too